Cabey type scraper



E. B. MALOON CARRY TYPE SCRAPER Nov. 18, 1941.

Original Filed Fb. a, 1957 2 Sheets-Sheet 1 llll'l'lll lllll ll Nov. '13, 1941.

E. B. MALOQN GARRY TYPE SCRAPER Original Filed Feb. 6, 1937 2 Sheets-Sheet 2 digging into the earth.

Reissued Nov. 18, 1941 CARRY TYPE SCRAPER Earl B. Maloon, South Pasadena, Calii., assignor to'Southwest Welding and Manufacturing 00.,

Inc., Alhambra, Calif.

fornia a corporation of Call- Original No. 2,152,899, dated April 4, 1939, Serial No. 124,406, February 6, 1937- ,Application for reissue May 11, 1940, Serial No. 334,663

8 Claims.

This invention relates to a scraping implement such as employed in road building or other operations where the ground is to be leveled off by scraping and raising loads of dirt from the same. The invention particularly concerns a type of implement in which a scraping bowl or bucket is supported between, trucks, and mounted in such a way that the elevation of the bucket with respect to the ground line, can be regulated.

The general object of the invention is to provide means for supporting, the bowl, and controlling its movements in dumping the load that been taken up by the bowl;

One of the objects of the invention is to pro-v vide a construction in which the major part of the weight of the load and frame will be carried on the rear wheels of the truck.

A type of scraper has been employed in which the dirt is collected in a bowl having a movable piston, or pusher at the back of the bowl; and in.the dumping operation this pusher is moved forwardly so as to eject the load at the front end of the bowl. vention is to avoid the. necessity for employing a load ejector or pusher of this kind, and to construct the implement in such a way that the scraping knife or shoe maintains a relatively fixed position on the frame, regardless of the movements of the bowl ejecting the load. This bowl; and apron that cooperates with the bowl at its forward end to retain the load, are mounted between'side plates of the frame, and in which the movements of the apron and the bowl are has One of the objects of. this inthe broad ,scope of the invention is pointed ou in the appended claims.

In the drawings: I Fig. 1 is a plan of a scraping implement embodying my invention, and illustrating the same attached to the rear end of a tractor, the forward portion of the tractor being broken away. Fig. 2 is a side elevation of the implement illustrated'in Fig. 1.

coordinated in the operations of filling the.

bowl and dumping aload to any desired level.

A further object is to mount the bowl so that the bowl cannot be swung back when encountering an obstruction such as a heavy rock while Further objects of the invention will appear hereinafter.

The invention consists in the novel parts and combination of parts to be described hereinafter, all of which contribute to produce an eiiicient carry type scraper. Q

Fig. 3 is a vertical section through the implement in a front and rear direction, and illustrating the relation of the parts when the shoe and bowl are held slightly above the ground level, and showing the apron closing the forward .end of the bowl, and assisting in retaining the load.

Fig. 4 is a vertical section similar to Fig. 3, but with certain parts broken away; in this view the bowl and apron are represented in the relation which they have when the load is being dumped ported respectively on two forward wheels 3, and 1 four rear wheels 4. The forward truck I is rigidly secured to two side plates 5 preferably having substantially the outline indicated in Fig. 2.

These parts constitute parts of the frame of the implement, and in accordance with the invention they are connected together insuch a way as to enable the plates 5 to be raised or lowered with respect to the ground level; in other words, these parts constitute the frame of the implement, and are connected together in such a way as to enable the shoe 6 located forward of the bowl I, to be raised orlowered at will. In order to accomplish this, the rear truck 2 is preferably provided with rigid forwardly projecting side arms 8 that extend forwardly to a point about midway between the two trucks, at which point the arms 8 are connected by pivot bolts or pins 9 to the side plates.

. Rigidly secured to the side plates 5 adjacent I the rear ends of the said plates 5, I provide a truss frame It including a transverse lower beam II and a transverse upper beam i2. The shoe 6 is preferably rigidly-secured at its ends to the side plates 5, and preferably includes an inclined cuta ter, plate I3 that cuts into the earth when the piano hinge; that is to say. the forward edge of the bottom plate I5 is formed with integral sleeves i6 bent around the pivot bar I4 and alternating in position, with similar sleeves i1 formed integral with the plate l3. This forms a closed hinge connection facilitating the passage .of the dirt over this joint; and the sleeves I6 and I1 protect the forward edge of the bottom [5 and prevent its being bent out of position by rocks, which may be encountered in the dirt;

The rear end of the bottom plate I5 is preferably bent upwardly to form an integral dished end thereof and then along the top of said beam and around vertically disposed sheaves 31a. The cable extends thence downwardly as at II and is then reeved in a'series of falls ll through a series of sheaves 39 and ll mounted respectively on the lower beam II and a bolster I! on the rear truck 2. 7

It will thus be seen that the rear end of the side plates 5 are suspended on the falls ll of the cable extending between the'blocks oi sheaves 89 and ll respectively. Since these side plates 5 are pivrear head It for the bowl, and this head and the bottom plate ii are preferably braced by side gus-' set plates l9; that form rudimentary side plates for the bowl. If desired, these gusset plates I! may be made integral with the bottom and rear head It.

When the bowl is in the position of rest as indicated in Fig. 3, the stop bracket carried by the rear end of the bowl, rests against the upper side of the lower beam II. and this limits the downward movement of the rear end of the bowl.

The upper and rear end of the bowl may be braced by a substantially vertical brace plate 2|.

the lower end of which connects to a transverse channel brace 22 and the upper end of which is secured to a substantially horizontal transverse plate 23. In this way the plates 2| and 23 cooperate with the dished head It to form a substantially triangular box-form girder at the upper rear end of the-bowl.

During a scraping operation with this implement, the shoe 6 is held at a low level so as to engage the dirt to be picked up, and the dirt passes back over the shoe into the rear end of the bowl. As this takes place an apron 2| at the forward end of the bowl is held in an elevated position; that is to say, in a partially open position so that as the dirt passes up between the lower edge 25 of the apron and the shoe 6, the dirt piling up in I the bowl can gravitate in to the bowl. after which the apron would be moved to a closed position so as to retain a relatively large load as indicated by the dotted line 28. The apron is preferably pivotally supported on the pivot pins, or bolts 9, that connect the arms I to the side plates 5. The apron preferably includes substantially triangular side plates 21, and includes a bottom plate 28, which preferably consists of a plate bent at a slight angle so that the bottom plate presents a lower panel 280, having greater inclination than the upper panel 28b formed by this plate. Suitable cable operated means are preferably employed for effecting the raising of the side plates 5 to regulate the elevation of the shoe 8 with respect to, the ground, and for controlling the movements of the apron 2| and bowl 1. The cables can be operated from a tractor 29 to which the forward end of the implement may be coupled by means of a suitable draw bar 3! (see Fig. 1).

The cable 3| indicated in full lines in Fig. 1 is that which is employed'i'or raising and lowering the side plates 5 and shoe i. Thiscable ll-passes rearwardly from the tractor and around guide sheaves 32 and 33 in a suitable housing 34 on the forward truck I. This cable then passes'rearwardly around a substantially horizontal guide sheave 36 mounted about midway of the front truck I, then around a substantially horizontal guide sheave 36 located at one side of the truck I. It then extends alongthe top of one of the side plates 5 and around a substantially vertical sheave 31' mounted on top cross beam I! at one oted at 9 to the arms 8 which are rigid with the truck 2, a pull on the cable II will shorten the falls between the pulley blocks I! and II and lift the rear ends of the side plates 5 and consequently the cutting blade 8 relative to thesupporting trucks l and 2. During this movement the outer ends of the arms 8 are lifted and the wheels 3 and 4 will be brought slightly nearer together,

because of a slight rotation of the connected forward and rear truck frame members I and I about the axis of their respective supporting wheels. when the parts are thus lifted the scraper is in carrying position; when lowered the scraper is in digging and loading. position.

The cable .43 for controlling the bowl 'I and the apron 24- is indicated in dotted lines in Fig. 1. This cable extends rearwardly from the tractor 29 and passes through suitable guide sheaves M and similar to the guide sheaves "and II, and from this point the cable passes rearwardly around a series of guide sheaves 46 from which the cable passes downwardly ina series of falls 41 and.around a series of sheaves ll attached to the under or forward side of the bottom plate 28 of the apron 24. When the slack of this cable is taken up, the first effect is to shorten-the falls 11, thereby causing a rotation of the apron 24 on the pivot bolts 9. Eventually this will pull the apron up against stops such as the stop ll illustrated in Fig. 3. After this takes place, slack will commence to be taken-up in a horizontal run SI of this cable will, of course, raise the rear end of the bowl, rotating the same on the pivot bar I4 that supports its forward edge. This relationof the bowl and apron is indicated in Fig. 4. This relation is established after the scraper bowl has been loaded with earth, and is dumping the earth. In dumping the earth the tractor I! would pull the implement forwardly so as to permit the load to gravitate through the opening formed between the lower edge of the apron and the forward edge of theshoe. -In doing-this, of course.

forward axlejl in any desired manner. but in the I present instance the drawing illustrates auni- Tension in this substantially horizontal run the shoe will level oil the dumped earth to the versal connection 55 employed for this purpose.

and involving the use of an inclined pin "mounted on the upper side of the drawbar ll, the end of this pin being connected by an upper bend I! to a vertical pin it rotatably mounted in theforward part of the forward truck I. This pin Bl corresponds .to a king pin. and permits swinging of the axle N in a horizontal plane when the truck is turning the implement around. It should be noted that in digging, the bowl cannot be swung rearwardly by great resistance at the shoe. as might occur from encountering a heavy rock in the earth. 7 The shoe of-thebowlis supporting the same, side rigidly secured in the frame and the bowl is on the shoe.

anon

The bowl i is located nearer to the rear truck than to the forward truck, and is supported on the cable falls It at the rear truck. The eflect is to support most of the weight of the frame and load on the rear truck. This is most advantageous as it distributes most of the total load on the four rear wheels I. n a

It is understood that the embodiment of the invention described herein is only one of the many embodiments this-invention may take, and I do not wish to be limited in the practice of the invention, nor in the claims, to the particular embodiment set forth.

What I claim is: n i

i. In a. scraping implement, the combination of a frame including a forward truck with wheels supporting the same, and a rear truck with wheels supporting-the same, a, frame supported on'the trucksoand including side plates, a transverse shoe secured between said side plates, a bowl pivotally mounted to swing up and down on an axis acUacent the shoe, a pivotally supported apron cooperating with thebowl to retain its load, and means operating when actuated, to swing the ends of the side plates, to lift the shoe above the ground level when dumping the load.

- 5. In a scraper, the combination of forward and rear wheel supports, a frame on said supports including side plates, a transverse scraper blade secured between said side plates, a bowl pivoted to swing up and down'on an axis adjacent said blade, a pivotally supported apron cooperating with the bowl to retain its load, and

means operating when actuated to swing the apron forwardly and upwardly first, and then to swing the bowl upwardly about its axis adjacent a said scraper blade for dumping the load.;

6. In a scraper, the "combination of forward and rear wheel supports, a frame on said supports including side plates, a transverse scraper blade apron forwardly and upwardly first, and then to swing the bowl upwardly about its axis at the shoe. for dumping the load.

2. In a scraping implement, the combination of a frame including a forward truck with wheels supporting the same, and a rear truck with wheels supporting the same. a frame supported on the trucks and including side plates, a transverse shoe secured between said side plates, a bowl pivotally mounted to swing up and down on an axis adjacent the shoe, a pivotally supported apron cooperating with the bowlto retain the load, a stop for limiting the upward swinging movement the apron, and means operating when actuated, to swing the apron forwardly and upwardly first until the same is arrested in its,

movement by the said stop. and operating ther'eafter to swing the bowl upwardly about its axis at the shoe, for dumping the load.

3. In a scraping i plement, the combination of a frame including a forward truck with wheels supporting the same, a rear truck with wheels supporting .the same, side plates rigid with the forward truck, arms rigid with the rear truck and pivotally attached to the side plates, a transverse shoe secured rigidly to said side plates. bowl pivotally mounted to swing up and down on an axis adjacent the shoe, a pivotally supported apron cooperating with the forward end. of the bowl to retain its load,' and means including cables for first swing t e apron forwardly and secured between said side plates, a bowl pivoted toswing up and down on an axis adjacent said blade, a-pivota1ly supported apron cooperating with th bowl to'retum its load, and means operating when actuated to swing the apron forwardly and upwardly first, and then to swing the bowl upwardly about its axis adj scent said scraper blade for dumping the load, said operating means including a cable and pulleys operatively asso- .ciated with said frame, said bowl and said apron.

'7. In a scraping implement, the combination of a frame including a forward truck with wheels for supporting the same, and a rear truck with wheels for supporting the same, a frame including side plates supported on said trucks, a transverse shoe secured between said side plates, a bowl pivotally mounted to swing up and down on an axis adiacent the shoe, an apron pivotally supported to swing on an axis between said side plates and cooperating with the bowl and the shoe to retain the load, sheaves supported by the frame and located adjacent the forward truck, a sheave attached to the apron, a cable passing over the first-named sheaves and having a fall extending down and around the sheave on the apron and thence extending rearwardly to an operative connection with the rear end of the bowl, a stop for limiting the upward swinging movement of the apron,-

said cable operating when the apron and bowl are in a position to carry the load, to take up the said fall first, and thereby raise the apron until it strikes the said stop, and operating thereafter to raise the rear end of the bowl, and thereby ef- 7 feet the dumping of the truck.

8; In a scraping implement, the combination of I a frame including a forward truck with wheels for 'supportingithe same, and a rear truck with wheels for supporting the same, a frame including side plates supported on said trucks. a transverse shoe securedbetween and side plates, a bowl pivotally mounted to'swing down on an upwardly, and then swinging the bowl aboutiits axis at the shoe and thereby raising the rear end of the bowl to dump the load. v

4. In a scraping implement, the combination ,of a frame including a forward truck with wheels supporting the same, a rear truck with wheels ates rigid with the forward truck, arms rigid th the rear truck verse" shoe secured between said side plates. a bowl pivotally mounted. to swing up and down on an .axis adjacent the shoe, a pivotalLv supported apron cooperating with the forward end of the bowl to retain its lead, means including cables for first swinging the apron forwardly and up, wardly and then raising the rear end of the bowl,

, and means including cables for raising therear axisadjacent the shoe, an apron pivotalLv supplates and cooperating with the bowl and the shoe to retain the load; sheaves supported by the frame and located adJacent the forward truck, a sheave attached to the apron, a cable passing over tbefirst-named sheaves and having a fall extendand pivotally attached to the side plates, a trans- I ing down andaroundthe sheave on the apron and thence extending rearwardly to an operative connectlon with therear end of the bowl, a stop for upward swinging movement of the apron, said parts cooperating to enable the cable to hold the apron in a more or less raised position while the implement is loading the bowl, the

paying out of the said cable thereafter operating to permit the apron to descend to close the forward end of the bowl for carrying th load.

' EARL B. MALOON, 

